The voice box or sound-producing organ in humans is the:
A. Larynx
B. Bronchi
C. Pharynx
D. Trachea
Answer: Option A
Solution (By JKExamLibrary)
The larynx, also called the voice box, contains vocal cords that vibrate as air passes, producing sound. It is located at the top of the trachea. The trachea (windpipe) conducts air; pharynx is the common passage for food and air; bronchi lead to lungs. The larynx is cartilaginous, and in males, the thyroid cartilage forms the Adam's apple.
Explanation:
Nitrification is a two-step process: oxidation of ammonia to nitrites by bacteria like Nitrosomonas, and then nitrites to nitrates by Nitrobacter. Ammonification is the release of ammonia from organic matter. Denitrification reduces nitrates to N₂ gas. Nitrogen fixation converts atmospheric N₂ to ammonia. Nitrification makes nitrogen available to plants as nitrates, which are easily absorbed.
Explanation:
Glyoxysomes are specialized peroxisomes found in germinating oil seeds. They contain enzymes of the glyoxylate cycle, converting fatty acids to carbohydrates until the seedling can photosynthesize.
Explanation:
The Smooth Endoplasmic Reticulum (SER) lacks ribosomes on its surface and is primarily involved in the synthesis of lipids, including sterols and phospholipids. In liver cells, SER also plays a crucial role in the detoxification of poisons and drugs. Rough ER, which has ribosomes, is responsible for protein synthesis.
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